CN110666406A - Superaudio square wave pulse polarity-changing welding control system and control method thereof - Google Patents
Superaudio square wave pulse polarity-changing welding control system and control method thereof Download PDFInfo
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- CN110666406A CN110666406A CN201910996483.8A CN201910996483A CN110666406A CN 110666406 A CN110666406 A CN 110666406A CN 201910996483 A CN201910996483 A CN 201910996483A CN 110666406 A CN110666406 A CN 110666406A
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- 238000003466 welding Methods 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000012545 processing Methods 0.000 claims abstract description 45
- 238000005070 sampling Methods 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 claims description 44
- 230000002093 peripheral effect Effects 0.000 claims description 37
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 4
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims description 3
- 230000003993 interaction Effects 0.000 abstract description 6
- 230000009123 feedback regulation Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
Abstract
The invention discloses a superaudio square wave pulse polarity-changing welding control system and a control method thereof, wherein the control system comprises: the touch screen, the driving circuit and the sampling feedback circuit are all connected with the central processing unit; the driving circuit is connected with the sampling feedback circuit through the main circuit. The invention has the touch screen control function, has good human-computer interaction performance, has the closed-loop feedback regulation function of welding parameters, and can accurately acquire and regulate the welding parameter values actually output by the welding machine in real time.
Description
Technical Field
The invention belongs to the technical field of welding systems, and particularly relates to a superaudio square wave pulse polarity-changing welding control system and a control method thereof.
Background
In actual industrial production, the method is different from the traditional automatic welding method in that only the switching values of a wire feeder start-stop switch, a welding machine arc starting switch, a gas valve switch and the like are controlled, the superaudio square wave pulse polarity-changing welding needs to control a plurality of parameters such as base value current, a current difference value, polarity-changing frequency, polarity-changing duty ratio, low-frequency pulse frequency, pulse current duty ratio, superaudio square wave pulse current, superaudio square wave pulse frequency, superaudio square wave pulse duty ratio and the like in real time, and high requirements are provided for the real-time performance and the reliability of data transmission of a welding control system; in application scenes such as special-shaped piece welding and all-position welding, a welding gun needs to rotate, swing and the like, welding parameters such as welding voltage and current need to be changed accordingly, the welding parameters can be updated in real time according to the change of the welding position, and the requirement on the performance of a welding system is further improved.
With the rapid development of computer science, the mechanical production industry is developing towards intellectualization and automation, visual human-computer interaction, industrial robots, new remote control equipment and new technologies are being widely applied in the welding industry, and the requirements on the intelligent level of a welding control system and the compatibility of peripheral intelligent equipment are high. At present, in industrial production, manufacturers have a variety of devices, and communication interfaces and communication protocols applied by each manufacturer have a variety, which requires that interfaces configured by a welding control system and communication protocols supported by the welding control system should also have universality and compatibility.
Therefore, how to provide a safe, reliable and highly applicable welding control system with ultra-audio square wave pulse changing polarity and a control method thereof are problems to be solved by those skilled in the art.
Disclosure of Invention
In view of this, the invention provides a superaudio square wave pulse polarity-changing welding control system and a control method thereof, which have a touch screen control function, good human-computer interaction performance, a real-time feedback adjustment function of welding parameters, and can accurately acquire and adjust the welding parameter values actually output by a welding machine.
In order to achieve the purpose, the invention adopts the following technical scheme:
a superaudio square wave pulse polarity-changing welding control system comprises: the touch screen, the driving circuit and the sampling feedback circuit are all connected with the central processing unit; the driving circuit is connected with the sampling feedback circuit through the main circuit.
Preferably, the central processing unit is connected with the peripheral device through a communication interface.
Preferably, the communication interface comprises an RS485 interface, an RS232 interface, a CAN interface or an RJ45 interface.
A control method of a superaudio square wave pulse polarity-changing welding control system comprises the steps that a central processing unit receives a welding parameter set value from a touch screen, PWM containing control information is transmitted to a driving circuit after processing, the driving circuit drives a main circuit to output a set welding parameter value, a feedback circuit is adopted to collect an actual output value of the welding parameter in real time and continuously feed the actual output value back to the central processing unit, the central processing unit adjusts the pulse width of the PWM transmitted to the driving circuit according to data, the welding parameter is regulated and controlled, and meanwhile, the collected welding parameter value information is transmitted to the touch screen to be displayed in real time.
Preferably, before receiving the welding parameter setting value from the touch screen, the central processing unit sends the pre-stored initial value of the welding parameter to the touch screen to complete initialization of the display content of the touch screen, and if communication is not completed within a specified time, the touch screen prompts an error message.
Preferably, the central processor also controls the peripheral devices through the communication interface.
Preferably, the control of the peripheral device comprises the steps of: the control parameter value input through the touch screen is received or the control parameter value which is programmed in advance is packed according to the regulations of the relevant communication protocol and then is sent to the central processing unit, the central processing unit completes the analysis of the data frame, repacks the control information parameter according to the different communication requirements and the requirements of the required communication protocol, sends the control information parameter to the peripheral equipment through the corresponding communication interface, and then receives the feedback information of the peripheral equipment through the corresponding communication interface and carries out corresponding processing, thus completing the bidirectional transmission of data.
Preferably, the central processing unit issues a connection request data frame according to the provisions of different communication protocols, and monitors whether a return data frame exists at each data interface in an interrupt mode.
Preferably, if any peripheral device sends a DeviceNet MAC ID data frame and passes the repeated address check, the central processing unit and the peripheral device establish connection based on a DeviceNet protocol; if the peripheral equipment sends a Client terminal connection request and passes verification, the central processing unit is used as a Server terminal to establish connection with the peripheral equipment on the basis of a TCP/IP protocol; if the peripheral equipment replies the data frame with the specific function code, the central processing unit establishes connection with the peripheral equipment based on the Modbus protocol.
The invention has the beneficial effects that:
the invention is safe and reliable, has strong applicability, has a touch screen control function and has good human-computer interaction performance; the welding parameter real-time feedback adjusting device has the real-time feedback adjusting function of welding parameters, and can accurately acquire and adjust the welding parameter values actually output by a welding machine in real time; the wire feeder has the advantages of having a high-speed communication function, realizing reliable real-time transmission of large data volume, having various communication interfaces, supporting various communication protocols, having good compatibility and adaptability to various existing devices in the market, such as wire feeders of different manufacturers and specifications, industrial robots and the like, and having good market value and wide application prospect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of the system structure of the present invention.
FIG. 2 is a flow chart of the method of the present invention.
FIG. 3 is a schematic diagram of a touch screen control interface according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a superaudio square wave pulse polarity-changing welding control system, comprising: the touch screen, the driving circuit and the sampling feedback circuit are all connected with the central processing unit; the driving circuit is connected with the sampling feedback circuit through the main circuit.
The central processing unit is provided with a peripheral control circuit, and the central processing unit and the peripheral control circuit are connected with peripheral equipment through a communication interface. Wherein, the communication interface comprises an RS485 interface, an RS232 interface, a CAN interface or an RJ45 interface. The RS485/232 interface is based on Modbus communication protocol, the CAN interface is based on CAN or DeviceNet communication protocol, and the RJ45 interface is based on TCP/IP communication protocol. The real-time setting of welding parameters and the control of peripheral equipment are completed based on the central processing unit which is configured with the touch screen and various communication interfaces.
Referring to the attached drawing 3, in another embodiment, the control interface autonomously developed by the touch screen comprises control functions of setting the numerical value of the welding parameter, displaying the feedback of the welding state, displaying the feedback of the actually output welding parameter value, starting and stopping the welding, and the like, and is efficient and intuitive, and good in human-computer interaction.
The welding parameters include: the system comprises a basic value current, a current difference value, a polarity-changing frequency, a polarity-changing duty cycle, a low-frequency pulse frequency, a pulse current duty cycle, a superaudio square wave pulse current, a superaudio square wave pulse frequency, a superaudio square wave pulse duty cycle, an arc striking current, air supply time in advance, air off time behind, slope ascending time and slope descending time.
The invention also provides a control method of the superaudio square wave pulse polarity-changing welding control system, wherein the central processing unit receives the welding parameter setting value from the touch screen, the PWM containing control information is transmitted to the driving circuit after processing, the driving circuit drives the main circuit to output the set welding parameter value, the feedback circuit is adopted to collect the actual output value of the welding parameter in real time and continuously feed back the actual output value to the central processing unit, the central processing unit adjusts the pulse width of the PWM transmitted to the driving circuit according to the data, regulates and controls the welding parameter, and simultaneously transmits the collected welding parameter value information to the touch screen for real-time display.
The central processing unit receives welding parameters input by using the touch screen or packages welding parameter values which are programmed in advance according to related communication protocols and then sends the welding parameter values to the central processing unit, the central processing unit receives and processes data frames, welding parameter setting information is sent to the driving circuit, meanwhile, data frames of actually output welding parameter information collected by the sampling circuit are received, after analysis, the actual output value of the welding machine is sent to the touch screen for real-time display, and meanwhile, feedback adjustment information is sent to the driving circuit to carry out correction control on the welding parameters.
In another embodiment, before receiving the welding parameter setting value from the touch screen, the central processing unit sends the pre-stored initial value of the welding parameter to the touch screen to complete initialization of the display content of the touch screen, and if communication is not completed within a specified time, the touch screen prompts an error message.
The central processor also controls the peripheral equipment through a communication interface, wherein the model of the central controller adopts MC9S12XEP100MAL of Freescale company. The control of the peripheral device comprises the following steps: the control parameter value input through the touch screen is received or the control parameter value which is programmed in advance is packed according to the regulations of the relevant communication protocol and then is sent to the central processing unit, the central processing unit completes the analysis of the data frame, repacks the control information parameter according to the different communication requirements and the requirements of the required communication protocol, sends the control information parameter to the peripheral equipment through the corresponding communication interface, and then receives the feedback information of the peripheral equipment through the corresponding communication interface and carries out corresponding processing, thus completing the bidirectional transmission of data.
The central processor issues connection request data frames according to the provisions of different communication protocols, and monitors whether each data interface has a return data frame in an interrupt mode. If peripheral equipment sends a DeviceNet MAC ID data frame and passes the repeated address inspection, the central processing unit and the peripheral equipment establish connection based on a DeviceNet protocol; if the peripheral equipment sends a Client terminal connection request and passes verification, the central processing unit is used as a Server terminal to establish connection with the peripheral equipment on the basis of a TCP/IP protocol; and if the peripheral equipment sends the data frame with the specific function code, the central processing unit and the peripheral equipment establish connection based on the Modbus protocol.
The invention is safe and reliable, has strong applicability, has a touch screen control function and has good human-computer interaction performance; the welding parameter feedback adjusting device has the function of feedback adjustment of welding parameters, and can accurately acquire and adjust the welding parameter values actually output by the welding machine; the wire feeder has the advantages of having a high-speed communication function, realizing reliable real-time transmission of large data volume, having various communication interfaces, supporting various communication protocols, having good compatibility and adaptability to various existing devices in the market, such as wire feeders of different manufacturers and specifications, industrial robots and the like, and having good market value and wide application prospect.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A superaudio square wave pulse polarity-changing welding control system is characterized by comprising: the touch screen, the driving circuit and the sampling feedback circuit are all connected with the central processing unit; the driving circuit is connected with the sampling feedback circuit through the main circuit.
2. The superaudio square wave pulse polarity-changing welding control system of claim 1, wherein the central processing unit is connected to peripheral devices through a communication interface.
3. The welding control system and the control method thereof according to claim 2, wherein the communication interface comprises an RS485 interface, an RS232 interface, a CAN interface or an RJ45 interface.
4. A control method of a superaudio square wave pulse polarity-changing welding control system is characterized in that a central processing unit receives a welding parameter set value from a touch screen, PWM waves containing control information are transmitted to a driving circuit after processing, the driving circuit drives a main circuit to output the set welding parameter value, a feedback circuit is adopted to collect an actual output value of the welding parameter in real time and feed the actual output value back to the central processing unit, the central processing unit adjusts the PWM pulse width sent to the driving circuit according to data to realize real-time regulation and control of the welding parameter, and meanwhile, the collected welding parameter value information is sent to the touch screen to be displayed in real time.
5. The control method of the welding control system of the ultrasonic square wave pulse polarity change as claimed in claim 4, wherein the CPU sends the pre-stored initial values of the welding parameters to the touch screen before receiving the welding parameter setting values from the touch screen, so as to complete the initialization of the display content of the touch screen, and if the communication is not completed within the specified time, the touch screen prompts an error message.
6. The control method of the welding control system with the ultrasonic square wave pulse changing polarity as claimed in claim 4 or 5, wherein the central processing unit controls the peripheral devices through the communication interface.
7. The control method of the ultrasonic square wave pulse polarity-changing welding control system as claimed in claim 6, wherein the control of the peripheral device comprises the steps of: the control parameter value input through the touch screen is received or the control parameter value which is programmed in advance is packed according to the regulations of the relevant communication protocol and then is sent to the central processing unit, the central processing unit completes the analysis of the data frame, repacks the control information parameter according to the different communication requirements and the requirements of the required communication protocol, sends the control information parameter to the peripheral equipment through the corresponding communication interface, and then receives the feedback information of the peripheral equipment through the corresponding communication interface and carries out corresponding processing, thus completing the bidirectional transmission of data.
8. The method of claim 7, wherein the cpu issues connection request data frames according to the specifications of different communication protocols, and monitors whether there is a data frame returned from each data interface in an interrupt manner.
9. The control method of a welding control system with ultrasonic square wave pulse polarity change as claimed in claim 8, wherein if any peripheral device sends out DeviceNet MAC ID data frame and passes duplicate address check, the CPU and peripheral device establish connection based on DeviceNet protocol; if the peripheral equipment sends a Client terminal connection request and passes verification, the central processing unit is used as a Server terminal to establish connection with the peripheral equipment on the basis of a TCP/IP protocol; if the peripheral equipment replies the data frame with the specific function code, the central processing unit establishes connection with the peripheral equipment based on the Modbus protocol.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910996483.8A CN110666406A (en) | 2019-10-19 | 2019-10-19 | Superaudio square wave pulse polarity-changing welding control system and control method thereof |
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| CN201910996483.8A CN110666406A (en) | 2019-10-19 | 2019-10-19 | Superaudio square wave pulse polarity-changing welding control system and control method thereof |
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| CN110666406A true CN110666406A (en) | 2020-01-10 |
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Application publication date: 20200110 |